Improvement in coverings for boilers, pipes



we, COMPOSITIONS,

COATING 0R PLASTIC.

M SS Reference Q WALTER QHARA, or FALL RIVER, MASSACHUSETTS.

IMPROVEMENT 'IN covERmc'sFoR BOILERS, PIPES, 8:.0.

Specification forming part of Letters Patent No.159.2ofisdpted-Jannary 26, 1875; application filed i 4 l .1 December 5, 1874.

To all whom it may concern 'Be it known that I, WALT-Ea OHARA, of Fall River, in the county of-Bristol and State of Massachusetts, have invented certain new and useful Improvements in Non-Conducting Covering for Steamdioilers, Pipes, 850.; and I --do hereby declare that the following is a full,

' silicate andashes, for the purpose of covering the'cxterior' parts of steam-boilers, steam and hot-airpipes,aiid other surfaces upo'n which a nonconducting and fireproof covering is desirable. I I? I 1 The mode-ofpreparing the canvas or bagging ;is as follows; -.A layer or stratum of Tsuitahle thickness of plastic, formed of silicate of soda or other silicate, and ashes is sprcail over said canvas or b2l"lll' the said canvas or bagginglleing prev ously saturated ,with

silicate of soda or water-glass. The canvas or bagging thgs prepared is adjusted with the coated side next to the surface to which it is applied..- The outside of the canvasor bagging is then enveloped with tine canvas or cotton cloth said-sheathing 1s lielll in positi'on'by timed hesive'nature of the silicate, which firmly,

unites together the seams, and dispenses with the operation of sewin The sheathing also cate' of soda or water-glass, substantiallyas herein set forth.

In testimony that I claim the foregoing as my own invention I afiix my signature in, presence oftwo witnesses.

WALTER OHA'RA; Witnesses:

- 0. H. OHARA,

- B. F. Wrnsnow.

a szeihin of also saturated W1 s1 mate 0 soda or other silicate; The

of paint or other col0ring 

